Merge pull request #35 from asomers/pkg-cargo-audit

During CI, install cargo-audit from pkg instead of compiling from source

Author: asomers

.cirrus.yml

@@ -52,7 +52,7 @@ task:
     - cargo +$VERSION clippy --all-features --all-targets -- -D warnings
   audit_script:
     - . $HOME/.cargo/env
-    - cargo install cargo-audit
+    - pkg install -y cargo-audit
     - cargo audit
   # Test our minimal version spec
   minver_test_script: